Which abbreviation is used to indicate a medication should be administered in the right ear?

The abbreviation used to indicate that a medication should be administered in the right ear is "ad." This abbreviation comes from the Latin term "auris dextra," meaning right ear. It is commonly used in prescriptions to specify the route of administration for ear medications.

Understanding these abbreviations is crucial for pharmacy technicians, as they ensure that the medication is administered correctly and safely. Other abbreviations that may seem similar but have different meanings include "as," which refers to the left ear (auris sinistra), and "od" and "os," which relate to the right and left eyes, respectively. This adds a layer of complexity to interpreting prescriptions accurately, highlighting the importance of being knowledgeable about these specific terms.